Our Philip Harris Photosynthesis Apparatus is for measuring and analysing gas given off by plants such as Elodea. The apparatus comprises of two syringes connected to a collecting tube via a 3-way tap.This arrangement enables the gas to be drawn along the capillary tube by one syringe and collected into the second syringe for analysis.Backboard dimensions: 240mm x 100mmCapillary bore: 1mm